Bedroom is EXTREMELY NOISY and vibrates because the unit is on the top floor, and there is a water booster pump on the ceiling. I asked the host but they said there is nothing that they can do.
I couldn't relax or sleep and I would absolutely not stay again.
I went up to the ceiling to locate the water booster pump, so I'm 100% sure about the noise source. The two pumps alternatively operates for a few seconds, and then turns off. Because these pumps power the entire apartment building, the pump runs continuously 24/7 at random timings. I even turned if off once but the water pressure became so weak that someone had to turn it back on immediately.
Also, the host wasn't too responsive. I asked for check-out instructions a day before, to which they never replied.